"Is there something I'm missing here...?"
Yes, you are missing a lot, like the fact that astronomers really don't know how far away something is, if it is more than, say, about 3k light-years out. (Compare that to the size of the our own Milky Way galaxy = 1k ly thick by 100k ly in diameter.)
Let me explain...
Our main tool for measuring how far away something that is far away is, is to use parallax: We see what direction something is from our planet, then wait half a year to take the same measurement from 2AU away. If the difference in angle is 2 arcseconds (an arcsecond is 1/3600 of a degree), then the object would have been only 1 arcsecond of difference if we could have made our second measurement from the Sun. That would mean (if you do the trigonometry) that the object is about 206265 AUs away. That's about 3.26 light-years. It is also, by definition, a parsec (short for "parallax of an arc-second").
Even though 1 arcsecond is an eensy-weensy-itty-bitty-very-super-tiny-small angle, we have the equipment to accurately measure it. Nailing down Alpha Centauri, at about 4 light-years (just over a parsec) away, for instance, is a piece of cake. But as you go farther out, it gets harder. Judging the distance of an object by parallax that is 400 light-years away, for instance, would take equipment and methods which are one hundred times more accurate than those which could barely peg Alpha Centauri. Judging the actual distance of objects at 4000 light-years takes a thousand-fold increase in accuracy.
The bottom line is that at a certain point we can't tell jack using parallax. We lose 3-D vision of the stars, and everything looks like it was painted on a great curved canvas. The distance at which this happens is close enough that the vast majority of our own galaxy appears in 2-D. Certainly any other galaxy is way, WAY beyond the point where 3-D viewing becomes impossible.
So how do we tell how far away stuff is? We guess. Astrononers say, "Hmmm, that star has a color of 'this', and we think it's color should be 'that', and 'this' minus 'that' is the red shift. And a red shift of 'that' means it must be moving away at this speed. And our theory says the universe is this old; so (guesstimated speed) x (theoretical time) means it must be this far away.
So, when someone tells you that something is 29 BILLION light-years away, and you know we start guessing in the 100s or 1000s of light-years, then you KNOW they are flat out pulling a WAG out of their nether-regions.
If that doesn't knock your socks off, this might:
Not too long ago, one of these bright, telescope-toting homosapiens realized that the red shift from all these galaxies indicated an initial starting point for the universe which was, galactically speaking, very, very, Very, VERY close to our neck of the Milky Way. That was absolutely unacceptable, since it might fuel a creationist view of things. So a theory was invented that EVERYTHING was expanding: the space between galaxies, the space within galaxies, even the space between the atoms in your body. Then someone realized that doesn't quite hold water. Don't know where this theory has morphed to in recent years, as I do not try to track fairytales in the birthing process, but I await, with bemusement, the tortured death of it and the move to something even more insane.